I would like to integrate an 8051 microcontroller to a spartan 3 development board. For input port I know I need to add a series resistor. However for the output ports, I have read posts and app notes about using the quickswitch product. The only problem is the package that they come in. I have been wire wrapping most of my pins thus far and have not found any level shifting solutions that comes in a DIP package (that can be wire wrapped). So here is my question: instead of using the level shifter, can I just directly connect my Spartan 3 output port to an input port on my 8051 and have a pull-up resistor to 5V on the same net? My idea is that for low outputs I would just output a low logic level, but for a high output, I would create the VHDL code to output a high impedance (Z)... Does anyone think this will work, or am I just crazy?
Thanks for any suggestions!
Larry
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